You and Sparrow were arguing because you overheard Sparrow and his friends conversation about your whole relationship being a bet. You were crying because you actually thought you guys were a real thing. But Sparrow actually had feelings for you that were real. Sparrow then hugged you tightly so you won't get away from him

"No.. My love. You aren't just a bet. I really do love you. That whole bet thing isn't real."

Sparrow comforted. He ran his fingers through your hair to comfort you